Updated: July 15, 2023

Purple verbena, also known as Verbena bonariensis, is a stunning perennial plant that is popular among gardeners for its vibrant purple flowers and tall, slender stems. This plant is native to South America but has gained popularity around the world for its beauty and ability to attract pollinators like butterflies and bees.

If you are considering adding purple verbena to your garden or landscaping, you may be wondering how quickly this plant grows. Understanding its growth rate and habits can help you plan and care for it more effectively. In this article, we will explore the growth rate of purple verbena and provide tips on how to encourage healthy growth.

Growth Rate of Purple Verbena

Purple verbena is known for its vigorous growth rate. Once established, it can grow quite rapidly, reaching heights of 3 to 6 feet (1 to 2 meters) in a single growing season. This fast growth makes it an excellent choice for filling empty spaces in your garden or creating vertical interest.

The growth rate of purple verbena can be influenced by various factors, including soil conditions, climate, and care practices. Providing optimal growing conditions can help promote faster growth and ensure the plant reaches its full potential.

Optimal Growing Conditions for Purple Verbena

To encourage healthy growth and maximize the growth rate of purple verbena, it is essential to provide it with the ideal growing conditions. Here are some key factors to consider:

Sunlight

Purple verbena thrives in full sun conditions. It requires at least 6 hours of direct sunlight daily to grow and flower abundantly. When planting purple verbena, choose a location that receives ample sunlight throughout the day.

Soil

This plant prefers well-drained soil with a slightly acidic to neutral pH range (around 6.0 to 7.0). Ensure that the soil is fertile and rich in organic matter. If your soil is heavy and clay-like, consider amending it with compost or organic matter to improve its drainage and nutrient content.

Watering

Purple verbena has average water needs and prefers regular watering. However, it is important not to overwater the plant, as excessive moisture can lead to root rot and other fungal diseases. Water the plant deeply when the top inch of soil feels dry, and avoid wetting the foliage to prevent disease.

Temperature

Purple verbena is a perennial plant that is hardy in USDA zones 7 to 11. It can tolerate a wide range of temperatures but prefers moderate temperatures between 60°F to 80°F (15°C to 27°C). In colder regions, purple verbena may die back in winter but will regrow from the roots in spring.

Tips for Faster Growth

If you want your purple verbena to grow quickly and thrive, here are some additional tips to consider:

Fertilizing

Purple verbena benefits from regular feeding with a balanced fertilizer. Apply a slow-release granular fertilizer at the beginning of the growing season to provide essential nutrients throughout the year. Additionally, you can supplement with liquid fertilizers every few weeks during the growing season to encourage faster growth and abundant flowering.

Deadheading

To promote continuous blooming and encourage faster growth, deadhead spent flowers regularly. This involves removing faded flowers by cutting them back to a healthy leaf node or stem. Deadheading prevents the plant from diverting energy into seed production, allowing it to focus on developing new blooms and foliage.

Pruning

Pruning can help maintain the shape and size of purple verbena while also stimulating new growth. In early spring, before new growth emerges, prune back any dead or damaged stems. You can also cut back the entire plant by one-third to promote bushier growth and more flowers.

Division

Purple verbena plants tend to spread and form clumps over time. Dividing the plant every few years can help rejuvenate it and encourage faster growth. Dig up the clump, separate it into smaller sections, and replant them in well-prepared soil. This will not only promote healthier growth but also allow you to propagate new plants.

Conclusion

Purple verbena is a fast-growing perennial plant that can quickly add beauty and vertical interest to your garden or landscaping. By providing optimal growing conditions, regular maintenance, and following the tips outlined in this article, you can ensure that your purple verbena thrives and grows at its maximum potential. Enjoy the vibrant purple flowers and the pollinators it attracts while creating a stunning garden display.